// Copyright (c) 2009 John Ehn, ExtremeSwank.com
//
// Permission is hereby granted, free of charge, to any person
// obtaining a copy of this software and associated documentation
// files (the "Software"), to deal in the Software without
// restriction, including without limitation the rights to use,
// copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the
// Software is furnished to do so, subject to the following
// conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
// OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
// HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
// FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
// OTHER DEALINGS IN THE SOFTWARE.

namespace ExtremeSwank.OpenId
{
    /// <summary>
    /// Represents the mode used for authentication.
    /// </summary>
    public enum AuthenticationMode
    {
        /// <summary>
        /// Represents Stateful (smart) authentication.
        /// </summary>
        /// <remarks>
        /// <para>
        /// In Stateful authentication, the client will first create a 
        /// cached shared secret with the Identity Provider. An authentication
        /// request will then be passed to the Identity Provider through the user's web browser.
        /// Once the user has been authenticated at the Identity Provider, the response
        /// is sent back to the client through the web browser. The client will then verify the
        /// validity of the response using the cached shared secret.
        /// </para>
        /// <para>
        /// Stateful mode requires less processing at the Identity Provider
        /// and gives faster response to the user.
        /// </para>
        /// </remarks>
        Stateful,
        /// <summary>
        /// Represents Stateless (dumb) authentication.
        /// </summary>
        /// <remarks>In Stateless authentication, the authentication request is
        /// sent immediately to the Identity Provider through the user's web browser.
        /// The Identity Provider will authenticate the user and will eventually
        /// respond with the requested information, also passing the data through the 
        /// web browser. The Consumer will then communicate with the Identity Provider 
        /// directly to confirm the validity of the data.</remarks>
        Stateless
    };
}
